Ignition to Relay wire, no crank, no start

[BabySpinach]

Getting no crank and no start when I turn the key.

NSS bypassed. Still nothing.
Tested Relay and I'm getting 0v from the ignition key to the relay, thus the relay isn't firing. I should be getting 12v when key is in the cranking position.

I am able to start vehicle normally by shorting positive to solenoid on starter.

I cannot seem to find ANY wiring diagram on where the wire for the ignition start runs from the actual steering wheel/inside the vehicle.

1990 year if it makes a dif.

Any help is much appreciated! Thanks in advance!

[eaglescout526]

Ignition switch is actually on the top side of the column but you can only see it if you lower the column or crawl underneath and look up at the column. Does the starter relay have power anywhere? 

[BabySpinach]

1 minute ago, eaglescout526 said:

Ignition switch is actually on the top side of the column but you can only see it if you lower the column or crawl underneath and look up at the column. Does the starter relay have power anywhere? 

Starter relay has 12v on the power node. it SHOULD work as expected. Only thing I can see wrong is its not getting 12v from the ignition.

By top do you mean I can remove the Gauge cluster and it will be accessible? I am confused by what you mean by lowering the column.

[eaglescout526]

So lowering the column means removing the lower dash and the two retaining nuts that hold the supports for the column in place. And once the column is lowered you will see he switch is “on top” of the column. Those switches are notorious for having melted connectors and corrosion. 

[cruiser54]

[BabySpinach]

I don't have any of the lower plastic on and I can see the area with the four bolts. Do I need to remove these four bolts shown in the second to last picture?

[cruiser54]

On TOP of the column is where the ignition switch is. 2 small nuts. 3/8"? It's a pain. Easier if you lower the column. 

[BabySpinach]

Thank you! I will attempt tomorrow. Interesting to know this part goes bad. Makes me confident nothing else blew up given the testing I've performed.

[BabySpinach]

UPDATE:

I pulled the ignition switch and REPLACED it and it's still not starting...

HOWEVER.. If I jump 12v to the green wire on the ignition switch, the vehicle starts right up normally. (Even on the old switch)
This was tested with the ignition switch in the on position.

There is no damage to the old switch. No signs of corrosion or burning or discoloration on any terminal.

I must be misunderstanding all of the inputs to that switch. One of the other wires must be the culprit.

 

[eaglescout526]

Did we mention the possible misalignment of the ignition switch? IE you turn it to crank but instead it just turns everything in the cab on. 

[BabySpinach]

3 hours ago, eaglescout526 said:

Did we mention the possible misalignment of the ignition switch? IE you turn it to crank but instead it just turns everything in the cab on. 

Wouldn't i still be able to slide the slider all the way over and have the engine crank?

[eaglescout526]

Yes actually. I kinda forget how the slider assembly looks, it’s been a hot minute. 
 

Now let’s look at the big pic. Was the MJ running and driving prior to this? Has it sat for a while? Have you done any mods or improvements that would suddenly make the MJ not crank and run?

[BabySpinach]

8 hours ago, eaglescout526 said:

Yes actually. I kinda forget how the slider assembly looks, it’s been a hot minute. 
 

Now let’s look at the big pic. Was the MJ running and driving prior to this? Has it sat for a while? Have you done any mods or improvements that would suddenly make the MJ not crank and run?

Sat a few months but drove fine. Got it inspected and everything.  Zero issues until a day after inspection. No mods to engine. My only other guess here is the power wire on the ignition is loose or shorts.

[cruiser54]

http://cruiser54.com/?p=35

[BabySpinach]

On 8/31/2022 at 8:52 PM, eaglescout526 said:

Did we mention the possible misalignment of the ignition switch? IE you turn it to crank but instead it just turns everything in the cab on. 

This is what the issue was.

Remembered after taking it off that i was able to remove the screws for the ignition switch with my fingers. Slid bolt forward as much as it could, rebolted, and it turns on normally now.

This was after following FSM testing for the switch and checking all wires for shorts or connectivity issues.

Thanks for the help, everyone!